Polish Prime Minister Mateusz Morawiecki on Friday said that the country wanted to stay in the European Union, a day after a landmark court ruling that experts said could lead to "Polexit." 

"Poland's place is and will be in the European family of nations," the prime minister wrote on Facebook, adding that joining the bloc was "one of the highlights of the last decades" for Poland and the EU.

The Polish court on Thursday ruled that some EU treaty articles were "incompatible" with the Polish constitution and warned EU institutions not to "act beyond the scope of their competencies" by interfering with Poland's judiciary.